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bonjour

25 400 = 2.54 x 10 ⁴

25 000 000  = 2.5 x 10 ⁷

435  = 4.35 x 10 ²

1625  = 1.625 x 10 ³

3 450 000  = 3.45 x 10 ⁶

65 = 6.5 x 10

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